Error converting value {null} to type 'System.Int64'. Path 'data.orderid', line 1, position 134.

[ramanagajula1999]

@admin , I got this error multiple time today while placing the order. Can you help me with this.?
"Error converting value {null} to type 'System.Int64'. Path 'data.orderid', line 1, position 134."

[Mnagesh]

@ramanagajula1999 post the part of code so that we may understand what are the parameters or why that error occurred and try to fix it .

[kashyap33]

@ramanagajula1999 check the Quantity field. For me, it was quantity = 0 causing the issue.
Replying now so that it can help others facing this issue.